Bobbin winder for sewing machines



I S. RESTCHAK BOBBIN WINDER FOR SEWING MACHINES Filed Oct. 11, 1925 INV EN TOR wi 5 Sophie REsto/mif.

Patented Oct. 21, 1924.

SOPHIE RES'ICHAK, OF EXELAND, WISCONSIN.

BOBBIN WINDER FOB SEVIING MACHINES.

Application filed October 11, 1923. Serial No. 667,924.

To all "LU/107R it may concern:

Be it known that I, SOPHIE RESTOHAK, a citizen of the United States, residin at iilxeland, in the county of Sawyer and btate of Wisconsin, have invented certain new and useful Improvements in Bobbin Winders for Sewing Machines, of which the following is a specification.

This invention relates to sewing machines, having more particular reference to the facilitating of the winding of the. shuttle bobbin, the invention having for its object to eliminate the waste of time commonly experienced in rewinding this shuttle bobbin when the same becomes empty. Since the shuttle bobbin is necessarily of small size this rewinding has to be frequently done, and as ordinarily done, the workmans time is taken up entirely with such rewinding.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawing, and to the appended claims in which the various novel features of the invention are more particularly set forth.

Fig. 1 of the. drawing is a side elevational view showing my invention applied toa sewing machine.

Fig. 2 is a transverse vertical sectional view taken on the line 2- 2 of Fig. 1.

Referring now to the drawing the reference numeral indicates an ordinary sewing machine head and 11 the table of the machine. The usual drive pulley and belt are indicated at 12 and 13 respectively, the belt passing down through the table in the usual manner to connect to the large treadle operated drive pulley, not shown.

Mounted in suitable bearing brackets 15 under the table 11, and extending longitudinally of the latter, is a shaft 16 having one end arranged to form a mandrel on which the bobbin to be rewound is placed, a bobbin being indicated at 17 in position on the end of this shaft. Hinged to one of the brackets 15, concentric to the shaft 16, is an arm 18 which extends upwardly through a suitable transverse slot 19 in the table 11, and has a stub-shaft 20 journaled in its upper end, this stub-shaft being parallel to the shaft 16. On one end of this stub-shaft 20 is fixed a grooved roller 21 which is adapted to engage and receive rotationlfrom the belt 13, while upon the other end of this stub-shaft is fixed a pulley 22 over which is looped a belt 23, which passes through the slot 19 in the table which accommodates the arm 18, this belt being looped also over a pulley 24 on the shaft 16.

Connected at one end to the arm 18, and at its opposite end to a suitable fixed part of the table, as here shown an eye 27 on the underside of the table 11 of the sewing machine, is a tension spring 28 which normally urges the arm to a position with the roller disengaged from the belt, the end wall of the slot 19, or other suitable stop means, limiting the movement of the arm 18 under the influence of spring 28. Formed on one side of the arm 18 is a hooked finger 30 which is adapted to be engaged by a hinged latch 31 to hold the arm 18 in position with the roller 21 bearing against the belt 13. The latch 31 is here shown as hinged to one of the brackets 15 and movement thereof to locking position may be limited by a stop lug 35. A spring 36 urges this latch 31 toward operative position, and the end of the finger 30 is preferably beveled as shown so that the latch will snap automatically into place when the arm 18 is pulled forward. Fulcrumed between its ends as at 38 to a suitable fixed part of the machine is a release or knock-off bar 39 having one end projecting above the latch 31 and the other end projecting above the bobbin 17, this latter end being downturned as shown at 39'.

To permit of ready placing of the bobbin on the end of shaft 16 the said end is in the form of a separate section 42 engaging in a boring in the shaft proper and having fixed thereto a knob 42 projecting through a slot 43 in the shaft, a spring 43 hearing behind the section 42 and holding it in projected position The bobbin receives its thread from an ordinary spool mounted on a mandrel 45 supported under the table, the thread passing through a guide element 46 projected from one of the brackets 15.

Having thus described my invention what I claim as new and desire to protect by Letters Patent of the United States is as follows:

1. In a sewing machine, a drive belt, a

the roller disengaged. from the said belt, a latch for holding the arm in position With the roller engaged 'With the belt, and a device for releasing said latch.

2. In a sewing machine a drive belt, a shaft adapted to receive a bobbin, an arm fulcrunied concentric to said shaft, a roller carried by the free end of said arm and adapted to engage said belt, a drive connection between said roller and said shaft, a spring. urging said arm to position with the roller disengaged from the said belt, a latch for holding the arm in position with the roller engaged with the belt, and a device for releasing said latch, said device comprising a bar fnlcrnmed between its ends and adapted to engage the said hitch and the filled bobbin at opposite ends.

In testimony whereof I have aflixed my signature.

SOPHIE RESTCHAK. 

